feat(logging): add debug logs for key validation and request handling

- Add debug logs for invalid and valid API key masking
- Log unsupported content types in middleware
- Log forwarded request URLs and response statuses from LT server

src/ltProxyHandler.ts

@@ -37,12 +37,16 @@ export const handler: Handler = async (ctx) => {
     const headers = new Headers(ctx.req.headers);
     headers.delete('content-length');
 
+    console.debug('Forwarding request to:', proxyUrl.toString());
+
     const forwarded = await fetch(proxyUrl.toString(), {
         method: ctx.req.method,
         headers,
         body,
     });
 
+    console.debug('Received response from LT server:', forwarded.status);
+
     const respHeaders = new Headers(forwarded.headers);
     return new Response(forwarded.body, {
         status: forwarded.status,